Decrease by意思

"Decrease by" is an English phrase that means to subtract a certain amount from a starting value. It is often used in mathematical or financial contexts to indicate a reduction in quantity, size, or value. For example:

• "The company's profits decreased by 10% this year."
• "The temperature outside has decreased by 5 degrees since this morning."
• "To find the difference, simply decrease the larger number by the smaller one."

In these examples, "decrease by" is used to express a reduction in profits, temperature, or numerical difference, respectively.